Marin Cilic (CRO) during the final of the Swiss Indoors at St. Jakobshalle in Basel, Switzerland on October 30, 2016. (Photo by Miroslav Dakov/NurPhoto via Getty Images)

Marin Cilic (CRO) during the final of the Swiss Indoors at St. Jakobshalle in Basel, Switzerland on October 30, 2016. (Photo by Miroslav Dakov/NurPhoto via Getty Images)